1. Institute of Laser and Systems Technology, Hamburg University of Technology, Denickestr. 17, 21073 Hamburg, Germany
2. GE Aviation, Advanced Aviation Technology, Freisinger Landstrasse 50, 85748 Garching bei München, Germany
3. Autodesk Research, Autodesk Ltd., 6 Agar Street, London WC2N 4HN, United Kingdom